When the driver side window is down it rattles on every bump and when closing door. When I get the door panel off, is there going to be something I can do to repair this, or will I need to get a new part/retaining clip?

 

One of my friends had this same problem with a 02 Taco , and I belive the regulator came lose from the door. He did have the service performed under warranty- I will check with him to be sure what it was.
Richard

 

If my window is down it's all the way down...
Can't help you there but whatever you learn I'll appreciate reading in case it happens to me